Y_HAS_CPP_ATTRIBUTE macro

The new macro `Y_HAS_CPP_ATTRIBUTE` simplifies the check for C++ attribute support by handling nested `#if defined(__has_cpp_attribute)` checks.

Before:
```cpp
    #if defined(__has_cpp_attribute)
        #if __has_cpp_attribute(attribute_name)
           // use
        #else
           // fallback
        #endif
    #else
        // fallback
    #endif
```

After:
```cpp
    #if Y_HAS_CPP_ATTRIBUTE(attribute_name)
        // use
      #else
        // fallback
    #endif
```

The new macro also allows checking C++ attributes when compiling C code without raising errors related to different tokenization rules in these languages. Of course, such a test always returns `0` when compiling source code in C.

Also, rename `Y_HAVE_ATTRIBUTE` to `Y_HAS_ATTRIBUTE` for consistency.
commit_hash:9c12fe5d0e6a570d7f11910704c0a9b05d100434

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